云计算平台、架构和理论——英文云计算课件.ppt

Why we use cloud computing? Why we use cloud computing? Case 1: Write a file Save Computer down, file is lost Files are always stored in cloud, never lost Why we use cloud computing? Case 2: Use IE download, install, use Use QQ download, install, use Use C++ download, install, use …… Get the serve from the cloud What is cloud and cloud computing? Cloud Demand resources or services over Internet scale and reliability of a data center. What is cloud and cloud computing? Cloud computing is a style of computing in which dynamically scalable and often virtualized resources are provided as a serve over the Internet. Users need not have knowledge of, expertise in, or control over the technology infrastructure in the cloud that supports them. Characteristics of cloud computing Virtual. software, databases, Web servers, operating systems, storage and networking as virtual servers. On demand. add and subtract processors, memory, network bandwidth, storage. Grid Computing Cloud Computing share a lot commonality intention, architecture and technology Difference programming model, business model, compute model, applications, and Virtualization. Grid Computing Cloud Computing the problems are mostly the same manage large facilities; define methods by which consumers discover, request and use resources provided by the central facilities; implement the often highly parallel computations that execute on those resources. Grid Computing Cloud Computing Virtualization Grid do not rely on virtualization as much as Clouds do, each individual organization maintain full control of their resources Cloud an indispensable ingredient for almost every Cloud The Google File System The Google File System (GFS) A scalable distributed file system for large distributed data intensive applications Multiple GFS clusters are currently deployed. The largest ones have: 1000+ storage nodes 300+ TeraBytes of disk storage heavily accessed by hundreds